#!/usr/bin/python3
# Copyright 2022 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import atheris
import io
import sys

with atheris.instrument_imports():
  from werkzeug.formparser import FormDataParser
  from werkzeug.formparser import MultiPartParser

def TestOneInput(data):
  parser = FormDataParser()
  parser.parse(io.BytesIO(data), "multipart/form-data", 0)
  parser.parse(io.BytesIO(data), "application/x-url-encoded", 0)
  parser.parse(io.BytesIO(data), "application/x-www-form-urlencoded", 0)

  multiparser = MultiPartParser(len(data))
  try:
    multiparser.parse(io.BytesIO(data), b"", len(data)) 
  except ValueError as e:
    if "Invalid form-data" in str(e):
      return
    raise e


def main():
  atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
  atheris.Fuzz()


if __name__ == "__main__":
  main()
